Precision electroweak physics with the SLD/SLC: The left-right polarization asymmetry
- Columbia Univ., New York, NY (United States). Dept. of Physics
Following a brief review of a commonly used general framework for the analysis of radiative corrections and possible new physics, the recent precision results from the SLD/SLC are discussed and used to test the standard electroweak model. In the 1993 SLD/SLC run, the SLD recorded 50,000 Z events produced by the collision of longitudinally polarized electrons on unpolarized positrons at a center-of-mass energy of 91.26 GeV. The luminosity-weighted average polarization of the SLC electron beam was (63.0 {plus_minus} 1.1)%. We measure the left-right cross-section asymmetry in Z boson production, A{sub LR}, to be 0.1628 {plus_minus} 0.0071 (stat) {plus_minus} 0.0028 (syst) which determines the effective weak mixing angle to be sin{sup 2} {theta}{sub W}{sup eff} = 0.2292 {plus_minus} 0.0009 (stat) {plus_minus} 0.0004 (syst). When averaged with our 1992 result, we obtain sin{sup 2} {theta}{sub W}{sup eff} = 0.2294 {plus_minus} 0. 0010. This result differs from analogous LEP results at the level of about 2.5 {sigma}. The world averages of electroweak data are comfortably in agreement with the standard model.
- Research Organization:
- Stanford Linear Accelerator Center, Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States); Istituto Nazionale di Fisica Nucleare, Rome (Italy); Japan-US Cooperative Research Project on High Energy Physics, Nagoya (Japan); Science and Engineering Research Council, Swindon (United Kingdom)
- DOE Contract Number:
- AC03-76SF00515; FG02-91ER40676; FG03-92ER40701; FG03-93ER40788; FG02-91ER40672; FG02-91ER40677; AC03-76SF00098; FG02-92ER40715; AC02-76ER03069; FG06-85ER40224; FG05-91ER40627; FG03-91ER40618; FG03-92ER40689; AC02-76ER00881; FG02-92ER40704
- OSTI ID:
- 10110314
- Report Number(s):
- SLAC-PUB--6700; CONF-9406273--4; ON: DE95006213; 35KA02000/35KA20100; 35KA02000/35KS01000; 35KA02000/35KS01000; 35KA02000/35KS01000; 35KA02000/35KS01000; KA0101000; 35AB01000/35HK02010; 35KA02000/35KS01000; 35KA02000/35KS01000; 35KA02000/KA0101000; 35KA02000/35KS01000; 35K
- Country of Publication:
- United States
- Language:
- English
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